/***flex布局**/
.flex {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
}

.flex-center {
    display: flex;
    align-content: center;
    justify-content: center;
    align-items: center;
    justify-items: center;
}

.flex-row {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-flex-direction: row;
    flex-direction: row;
}

.flex-col {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-flex-direction: column;
    flex-direction: column;
}

.flex-grow-0 {
    -webkit-box-flex: 0;
    -webkit-flex-grow: 0;
    -ms-flex-positive: 0;
    flex-grow: 0;
    -webkit-flex-shrink: 0;
    -ms-flex-negative: 0;
    flex-shrink: 0;
}

.flex-grow-1 {
    -webkit-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-positive: 1;
    flex-grow: 1;
    -webkit-flex-shrink: 1;
    -ms-flex-negative: 1;
    flex-shrink: 1;
}

.flex-x-center {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
}

.flex-x-right {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: end;
    -webkit-justify-content: flex-end;
    -ms-flex-pack: end;
    justify-content: flex-end;
}

.flex-y-center {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    -ms-grid-row-align: center;
    align-items: center;
}

.flex-y-bottom {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-align: end;
    -webkit-align-items: flex-end;
    -ms-flex-align: end;
    -ms-grid-row-align: flex-end;
    align-items: flex-end;
}

/* 主轴方向 main */
.m-start {
    justify-content: flex-start;
}

.m-end {
    justify-content: flex-end;
}

.m-around {
    justify-content: space-around;
}

.m-between {
    justify-content: space-between;
}

.m-center {
    justify-content: center;
}

/* 侧轴方向 second*/
.s-start {
    align-items: flex-start;
}

.s-end {
    align-items: flex-end;
}

.s-around {
    align-items: space-around;
}

.s-between {
    align-items: space-between;
}

.s-center {
    align-items: center;
}
